Github user NathanHowell commented on the pull request:
https://github.com/apache/spark/pull/257#issuecomment-38820877
Yes, that is what I'm doing. It's the only way I've gotten jobs that access
our secure HDFS cluster to run under Mesos. YARN sets this environment variable
and copies the token file before running the Spark executor, so HDFS access is
seamless under YARN.
I couldn't find much in the way of runtime security documentation for
Spark, or Hadoop really. Much of the code I did find seems to do nothing, e.g.
`SparkHadoopUtil.addCredentials`.
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